Connecting-rod for internal-combustion engines



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F, STOKES.

cowuscnue ROD FOR mrsmm comsusnou enemas.

- APPUCATlON FILED FEB.I0,I919. .7 1,331,881 Patented Feb. 24, 1920.

u- 55:52:55 A 0o UNITED STATES PATENT OFFICE.

FREMONT STOKES, or CLARKSVILLE, ARKANSAS.

CONNECTING-BOD FOR INTERNAL-COMBUSTION ENGINES.

Application filed l'sebruary 10, 1919. Serial No. 275,951.

To all whom it may concern.

Be it known that I, FREMONT STOKES, a citizen of the United States, residing at Clarksville, in the county of Johnson and State of Arkansas, have inventeafl certain new and useful Improvements in Connecting-Rods for Internal-Combusiion Engines, of which the following is a specification, re ference being had to the accompanying drawings. v

This invention relates to certain improvements in connecting rods and has relation more particularly to a device of this general character especially designed and adapted for use in connection with a piston and crank shaft of an internal combustion en'- gine, and it is an object of the invention to provide a rod of this typehaving novel and improved means whereby the same may be adjusted longitudinally in order to effect an adjustable combustion chamber and particularly to regulate or control compression.

Another object of'the invention is to provide a novel and improved connecting rod comprising two relatlvely movable sections or members adjustable one longitudinally of the other so that the coacting piston may be variably set relative to the crank in order to obtain the best results and especially as relates to compression.

An additional object of the inventionis to provide a novel and improved connecting rod of this general type embodying two longitudinally adjustable sections together with novel and improved means whereby the sections are locked in their different adjusted positions. I

The invention consists in the details of construction and in the combination and arrangement of the several parts ofmy improved connecting rod whereby certain important advantages are attained and the de-. vice rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more "fully set forth. V

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood 1- will now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a view partly in elevation and partly in section illustrating a connecting rod constructed in accordance with an em- Specification of Letters Patent.

bodiment of my invention, the coacting piston being indicated by dotted lines;

Fig. 2 is a fragmentary longitudinalsectional view taken through the connected end portions of the sections of the rod and on a line substantially at right angles to the line of section in Fig. 1, the locking members being shown in elevation; and

Fig. 3 is a sectional View taken substantially-onthe line 3-3 of Fig.2.

As disclosed in the accompanying drawings, C denotes a connecting rod in its entirety constructed in accordance with an embodiment of my invention, and which comprises two sections 1 and 2. The outer end portion of the section 1 isengaged, as at 3, in a conventional manner with the piston P while the outer end portion of the section 2 is also engaged, as at 4, in a conventional manner with the crank shaft S.

g The inner end portion of the section 2 at its axial center is providedwith an interiorly threaded socket 5, with which is engaged the peripherally threaded inner end;

portion 6 of the section 1. It will be obvious that upon rotation of the sections 1 and 2 one relative to the other, the rod C may be lengthened or shortened as the occasions of practice may demand and which results in the desired spacing of the piston P relative to the crankshaft S so that the combustion chamber of the cylinder in which the piston P operates may be also'adjusted. As herein disclosed and as preferred the socket 9 is produced by disposing through the section 2 a slot, said slot intersecting the inner end portion of the socket and extending inwardly thereof. The slot is also of a width to permit unobstructed rotation of the section 1 and the member 2,

one with respect to the other. This adjustment of the combustion chamber is particularly advantageous in the regulation of compression as is believed to be clearly obvious to those skilled in the art to which my present invention appertains. I The inner end portion of the section 1 of the rod C at its axial center is provided with a bore or socket 7 angular in cross section and snugly and slidably engaged within said bore or socket 7 is a rod 8. The outer end of the rod 8 seats within a supplemental socket 9 arranged at the base of the socket or bore 5 and in which the rod 8 extends.

Removably disposed transversely through the section 2 and passing through the rod 8 is a pin or key 10 whereby the rod 8 operates to hold the sections 1 and 2 against relative rotation so that a desired seating or adjustment of the sections 1 and 2 longi tudinally is maintained. The rod 8 is of a length to contact with the base of the supplemental socket 9 and normally contacts therewith by gravity, so that the application of the pin 10 is materially facilitated as the opening in the rod 8 through which the pin 10 is directed is made in proper alinement with the openings on the section 2 through which said pin 10 is disposed.

When it is desired to adjust the sections 1 and 2 in a direction one longitudinally of the other, it is only necessary that said sections be relatively rotated and as the threads of the bore 5 are adapted in practice to be sixteen to the inch, it will be at once obvious that the sections 1 and 2 may be locked in difi'erent longitudinal adjustments of substantially one thirty-second'of an inch or one-half thread.

From the foregoing description, it is thought to be obvious that a connectingrod constructed in accordance with my mention-is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification Without departing from the principles and spirit thereof, and for this reason I do not wish to be understood as limiting myself to the precise arran ement and formation of the several parts ei'ein shown in carrying out my invention in practice except as hereinafter claimed,

I claim-:

1. In combil'iation, a member provided with a threaded socket and with a supple mental socket in connection with and positioned inwardly 01'' the first named socket, a member having threaded engagement with in the first named socket, the inserted end 'portion of the second member being provided with a bore angular in cross section, a rod snugly and slldably engaged within the bore of the second member and of a length to extend within the supplemental socket,

said rod normally engaging by gravity the bottom of the supplen'iental socket, and a removable pin disposed through the first named member and through the portion of the rod within said supplemental socket.

2. In combination, a member provided with a threaded socket and with a suppleinentalsocket in connection with and posi-' tioned inwardly of the first named socket, a member having threaded engagement within the first named socket, the inserted end 'portion of the second member being provided with a bore'angular in cross section, a rod snugly and slidably engaged within the bore of the second member and of a length to eX tend within the supplemental socket, said rod normally engaging by gravity the bottom of the supplemental socket, and a re movable pin disposed through the first named member and through the portion of the rod within said supplemental socket, the supplemental socket being of a diameter to permit unobstructed rotation of each of the members with respect to the other when the key is removed 3-. In combination, a member provided with a socket and having a slot disposed therethrough, said slot intersecting the inner end portion of the socket and extending inwardly thereof, a second member engaged within the socket; and provided at its inserted end with a bore angular in cross section, a rod snugly and slidably engaged within the bore of the second member and of a length to extend within a portionof the slot inwardly of the socket in the first named member and normallyengaging by gravity the inner end of the slot, and a (removable ke disposed through the first named mem er and the rod at a point inwardly of the socket.

4a In combination, a member provided with a socket and having a slot disposed therethrou'gh, said slot intersecting the innei' end poition of the socket and extending inwardly thereof, a second member engaged within the socket and, provided at its inserted end with a bore angular in cross section, a rod snugly and slidably engaged within the bore of thesecond member and of a length totextend within a portion of the slot inwardly of the socket in the first named member, and a removable key disposed through the first named' member and the rod at a point inwardly of the socket, the slot being of a width to permitunobstructed roation of one ot he members with respect to the other when the key is'removed.

In testimony whereof'I hereunto affix my signature in the presence of two witnesses. I H FREMONT STOKES; Witnesses:

ROBERT A; BOSWELL W. E. Lawson, 

